这两种肥料一起使用时产生的协同效应比单独使用任何一种效果都要好。

The ___synergistic effect of these two fertilizers works better together than using either one alone.

医生和护士的协同合作确保了病人得到最佳治疗。

The ___synergistic teamwork between doctors and nurses ensured the best care for patients.